To constitute a high-frequency apparatus, a resonator, a filter, a waveguide which are capable of being constituted by combining a plurality of members on which electrodes made of a superconducting film are formed, and a communication apparatus using the same.

Superconducting films 2b, 2f are formed on the surfaces of base materials 1b, 1f to be bonded, and metallic films 3b, 3f are formed on the prescribed portions thereof. By bonding the metallic films on the prescribed portions of a metallic framework 4, the superconducting films of the surfaces of two base materials are electrically connected via the metallic films and the framework.